Improvement in combined latch and lock



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JAMES BRADY, OF NORWI'CH, CONNECTICUT, ASSIGNOR TO THE ALLEN AND BRADY LOCK COMPANY, OF SAME PLACE.

IMPROVEMENT IN COMBINED LATCH AND LOCK The Schedule referred to in these Letters Patent and making part of the name.

To il whom. it may concerny Be it known that I, JAMES BRADY, of Norwich, in the county of New London, and State of Connecticut, have invented a new and useful Improvement in Locks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in which- Figure l represents a face view ofthe interior of a lock, constructed in accordance with my improvement.

Figure 2, a transverse section ofthe same, through the line :t in g. 1, and

Figure 3, a face view of a key or former, that may be used in opening the lock.

Figure 4 is a face View of the outside follower, and yoke operated by the same, detached` Similar letters of reference indicate corresponding parts.

My improvement relates to locks, in hich a keyis only used 'to bring the tumblers into line to admit of thesliding action of the bolt, as contradistinguished from locks in which the bolt is shot or worked back by the turning of 'the key, said key, in this, my improvement, simply acting as a formen to direct the tumblers in proper position to admit 'of the working of the bolt, by the turning of the knob-spindle when working the lock, say, from the outside of the door, no key being necessary to operate the lat-ch` or bolt from the opposite side, and the knob-spindle, in both instances it may be, turning in either direction to .draw back the bolt.

lAn important featui'e in this, my improvement, 'consists in .the employment of a spreader or spreaders to the tumbler, for holding the latter so as to admit of the free insertion of vthe key, the same operating in connection with what is known in the trade as a jointed knob-spindle, and independent hubs or followers, for operating the bolt by the turning of the one knob without rotating the other.

Referring to the accompanying drawing- A represents the lock-shell or case, and

B, its covering-plate, arranged on the inside of the door.

C is the inside hub or follower, through which the jointed knob-spindle passes, said follower, whichever way it is turned by rotating theinside knob, acting on a yoke, D, of the sliding latch or bolt E,'to draw the latter back, said bolt being shot forward again, or intol lock, by a spring, a, and, in such double action, operating independently of the other working-parts of the lock, a slot, b, serving to establish such free action of it.

F is the outside hub or follower, which is here shown of peculiar' construction, being formed with operatingedges or ends, c and d, to spreaders or levers G G, in addition to its bolt-operating projection e, which acts upon or against an independentFsliding' yoke H, that is in gear with the bolt E, by a projection, f, fitting through the slot b of the bolt.

The boltfoperating projection e, however, is not in the same immediate gear with its yoke H, as is the inside follower' with its yoke D, so that it will be necessary to turn such outside follower, by rotating i the outside knob, some distance, before it acts upon the bolt E through the projection F, in gear with the latter, and will primarily act upon the spreaders G G, for a purpose hereinafter explained.

The spreaders G G arc here shown as levers, formed with legs, g g, and arms, hy it, and as arranged to cross each other, the same working on a centre or pivot, 'as at t'.

The legs g g, of said spreaders, are drawn together by a spring, k, and are forced apart by the ends, c or d, of the outside follower acting on or against the arms h h ofthe sprezulers, which latter are furthermore provided with lips or projections, l l, that, when the spreaders v are held apart by the ends o or d of the outside follower, serve to retain, in a separated or open condition, tumblers I I', and keep the latter from coverring the keyhole m, and so as to admit of the free insertion of the key J into the lock.

These tumblers are shown as hung to freely work or turn on or around the centre or pivot i, and as being drawn together, each set, I and I', by springs, n, which should be of less strength than the spring lc, to the legs g g of the spreaders G G, so that the spreaders, when not operated by the outside follower, will, as before observed, keep the reversely-'operating tumblers separated; but, when the outside knob has been turned to close the projections Z l of the spreaders, then the springs n will draw together the tumblers I I, to ad- .mit of their front ends fr tting into the notches t of the key or former J, on the insertion of the latter through the key-hole.

There may, of course, be any number of tumblers I I in each set, the key being notched to correspond, and so that only when the several tumblers t in their respective notches in the key, are openings s, made one in each tumbler, brought in line to admit of a projeotion, u, on a lever, M, entering said openings, said lever M being, say, pivoted, as at o, and connected, at its free end, with a. pin, w, on the projection lf of the yoke H.

From this description, it will be seen that the keyhole is always left uncovered, or the tumblers held from interfering with the free insertion of the key, and that no working of the outside knob or follower H can, without insertion of the key, bring the tumblers in unlocking position, that is, place their openings s in line, so that the bolt E may be worked back by permitting of the projection u of the lever M, that is in gear with the yoke H, to enter said openings, Without which the latch or bolt E cannot be drawn back, so far as operating the lock from the outside is concerned, but, on the key or former being inserted through the key-hole, then it is only requisite to turn the outside knob in While, to open the door from the inside, it is' simply necessary, Without using the key, to turn in either di-l rection the inside knob and follower C.

Thus the lock is secure against opening from the outside without the aid of aproper key or former, that here requires no action of the outside knob to insert, and, when inserted, only a continuous motion of said knob in the onew direction, and which may be to the right or left, to open the door, as before observed, While said lock operates as a simple latch from the opposite side, by turning the inside knob in either direction.

If desired, the key or former may only be notched on its one edge, and one set of tumblers and one spreader be employed, and the arrangement of the tumblers and parts such as that the key Will enter the 'lock in a crosswise direction to that here shown for it by the position of the key-hole, and numerous other modifications or changes made without departing from the principle of my invention; as, for instance, the spreaders may be variously "constructed, to have a like control ofthe tumblers.

What is here claimed, anddesired to be secured by Letters Patent, is-

l. The combination, with the tumblers oi' the lock, or" the spreaders G G, operating to hold the tumblers clear ofthe key-hole, When at'rest, and to release them by turning the knob-spindle or its follower, to 

